Configuring turbo.json

Configure the behavior of turbo by adding a turbo.json file in your Workspace's root directory.

Global options

extends

{
  "extends": ["//"]
}

Extend from the root turbo.json to create specific configuration for a package using Package Configurations.

• The only valid value for extends is ["//"] to inherit configuration from the root turbo.json.
• If extends is used in the root turbo.json, it will be ignored.

globalDependencies

{
  "globalDependencies": [".env", "tsconfig.json"]
}

A list of globs that you want to include in all task hashes. If any file matching these globs changes, all tasks will miss cache. Globs are relative to the location of turbo.json.

By default, all files in source control in the Workspace root are included in the global hash.

globalEnv

{
  "globalEnv": ["GITHUB_TOKEN", "PACKAGE_VERSION", "NODE_ENV"]
}

A list of environment variables that you want to impact the hash of all tasks. Any change to these environment variables will cause all tasks to miss cache.

For more on wildcard and negation syntax, see the env section.

globalPassThroughEnv

{
  "globalPassThroughEnv": ["AWS_SECRET_KEY", "GITHUB_TOKEN"]
}

A list of environment variables that you want to make available to tasks. Using this key opts all tasks into Strict Environment Variable Mode.

Additionally, Turborepo has a built-in set of global passthrough variables for common cases, like operating system environment variables. This includes variables like HOME, PATH, APPDATA, SHELL, PWD, and more. The full list can be found in the source code.

ui

Default: "stream"

Select a terminal UI for the repository.

"tui" allows for viewing each log at once and interacting with the task. "stream" outputs logs as they come in and is not interactive.

{
  "ui": "tui" | "stream"
}

dangerouslyDisablePackageManagerCheck

Default: false

Turborepo uses your repository's lockfile to determine caching behavior, Package Graphs, and more. Because of this, we use the packageManager field to help you stabilize your Turborepo.

To help with incremental migration or in situations where you can't use the packageManager field, you may use --dangerously-disable-package-manager-check to opt out of this check and assume the risks of unstable lockfiles producing unpredictable behavior. When disabled, Turborepo will attempt a best-effort discovery of the intended package manager meant for the repository.

{
  "dangerouslyDisablePackageManagerCheck": true
}

cacheDir

Default: ".turbo/cache"

Specify the filesystem cache directory.

{
  "cacheDir": ".turbo/cache"
}

daemon

Default: true

Turborepo runs a background process to pre-calculate some expensive operations. This standalone process (daemon) is a performance optimization, and not required for proper functioning of turbo.

{
  "daemon": true
}

envMode

Default: "strict"

Turborepo's Environment Modes allow you to control which environment variables are available to a task at runtime:

• "strict": Filter environment variables to only those that are specified in the env and globalEnv keys in turbo.json.
• "loose": Allow all environment variables for the process to be available.

Read more about Environment Modes.

{
  "envMode": "strict"
}

Defining tasks

tasks

Each key in the tasks object is the name of a task that can be executed by turbo run. Turborepo will search the packages described in your Workspace's configuration for scripts in package.json with the name of the task.

Using the rest of the configuration described in the task, Turborepo will run the scripts in the described order, caching logs and file outputs in the outputs key when provided.

In the example below, we've defined three tasks under the tasks key: build, test, and dev.

{
  "$schema": "https://turbo.build/schema.json",
  "tasks": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
    },
    "test": {
      "outputs": ["coverage/**"],
      "dependsOn": ["build"]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}

Task options

Using the options available in the tasks you define in tasks, you can describe how turbo will run your tasks.

dependsOn

A list of tasks that are required to complete before the task begins running.

There are three types of dependsOn relationships: dependency relationships, same-package relationships, and arbitrary task relationships.

Dependency relationships

Prefixing a string in dependsOn with a ^ tells turbo that the task must wait for tasks in the package's dependencies to complete first. For example, in the turbo.json below:

{
  "tasks": {
    "build": {
      "dependsOn": ["^build"]
    }
  }
}

turbo starts at the "bottom" of the package graph and recursively visits each package until it finds a package with no internal dependencies. It will then run the build task at the end of the dependency chain first, working its way back to the "top" until all build tasks are completed in order.

Same package relationships

Task names without the ^ prefix describe a task that depends on a different task within the same package. For example, in the turbo.json below:

{
  "tasks": {
    "test": {
      "dependsOn": ["lint", "build"]
    }
  }
}

The test task will only run after the lint and build tasks have completed in the same package.

Arbitrary task relationships

Specify a task dependency between specific package tasks.

{
  "tasks": {
    "web#lint": {
      "dependsOn": ["utils#build"]
    }
  }
}

In this turbo.json, the web#lint task will wait for the utils#build task to complete.

env

The list of environment variables a task depends on.

{
  "tasks": {
    "build": {
      "env": ["DATABASE_URL"] // Impacts hash of all build tasks
    },
    "web#build": {
      "env": ["API_SERVICE_KEY"] // Impacts hash of web's build task
    }
  }
}

Wildcards

Turborepo supports wildcards for environment variables so you can easily account for all environment variables with a given prefix. For example, the turbo.json below include all environment variables that start with MY_API_ into the hash:

{
  "tasks": {
    "build": {
      "env": ["MY_API_*"]
    }
  }
}

Negation

A leading ! means that the entire pattern will be negated. For instance, the turbo.json below will ignore the MY_API_URL variable.

{
  "tasks": {
    "build": {
      "env": ["!MY_API_URL"]
    }
  }
}

Examples

passThroughEnv

An allowlist of environment variables that should be made available to this task's runtime, even when in Strict Environment Mode.

{
  "tasks": {
    "build": {
      // Values will available within `build` scripts
      "passThroughEnv": ["AWS_SECRET_KEY", "GITHUB_TOKEN"]
    }
  }
}

outputs

A list of file glob patterns relative to the package's package.json to cache when the task is successfully completed.

{
  "tasks": {
    "build": {
      // Cache all files emitted to the packages's `dist` directory
      "outputs": ["dist/**"]
    }
  }
}

Omitting this key or passing an empty array tells turbo to cache nothing (except logs, which are always cached when caching is enabled).

cache

Default: true

Defines if task outputs should be cached. Setting cache to false is useful for long-running development tasks and ensuring that a task always runs when it is in the task's execution graph.

{
  "tasks": {
    "build": {
      "outputs": [".svelte-kit/**", "dist/**"] // File outputs will be cached
    },
    "dev": {
      "cache": false, // No outputs will be cached
      "persistent": true
    }
  }
}

inputs

Default: [], all files in the package that are checked into source control

A list of file glob patterns relative to the package's package.json to consider when determining if a package has changed. turbo.json is always considered an input.

Visit the file glob specification for more information on globbing syntax.

{
  "tasks": {
    "test": {
      "inputs": ["src/**/*.ts", "src/**/*.tsx", "test/**/*.ts"]
    }
  }
}

$TURBO_DEFAULT$

Because specifying an inputs key immediately opts out of the default behavior, you may use the special string $TURBO_DEFAULT$ within the inputs array to restore turbo's default behavior. This allows you to tweak the default behavior for more granularity.

{
  "tasks": {
    "check-types": {
      // Consider all default inputs except the package's README
      "inputs": ["$TURBO_DEFAULT$", "!README.md"]
    }
  }
}

outputLogs

Default: full

Set output logging verbosity. Can be overridden by the --output-logs CLI option.

{
  "tasks": {
    "build": {
      "outputLogs": "new-only"
    }
  }
}

persistent

Default: false

Label a task as persistent to prevent other tasks from depending on long-running processes. Persistent tasks are made interactive by default.

Because a long-running process won't exit, tasks that would depend on it would never run. Once you've labeled the task as persistent, turbo will throw an error if other tasks depend on it.

This option is most useful for development servers or other "watch" tasks.

{
  "tasks": {
    "dev": {
      "persistent": true
    }
  }
}

Tasks marked with persistent are also interactive by default.

interactive

Default: false (Defaults to true for tasks marked as persistent)

Label a task as interactive to make it accept inputs from stdin in the terminal UI. Must be used with persistent.

This task is most useful for scripts that can be manipulated while they are running, like Jest or Vitest.

{
  "tasks": {
    "test:watch": {
      "interactive": true,
      "persistent": true
    }
  }
}

interruptible

Default: false

Label a persistent task as interruptible to allow it to be restarted by turbo watch.

turbo watch watches for changes to your packages and automatically restarts tasks that are affected. However, if a task is persistent, it will not be restarted by default. To enable restarting persistent tasks, set interruptible to true.

Remote caching

The global remoteCache option has a variety of fields for configuring remote cache usage

{
  "remoteCache": {}
}

enabled

Default: true

Enables remote caching.

When false, Turborepo will disable all remote cache operations, even if the repo has a valid token. If true, remote caching is enabled, but still requires the user to login and link their repo to a remote cache.

signature

Default: false

Enables signature verification for requests to the remote cache. When true, Turborepo will sign every uploaded artifact using the value of the environment variable TURBO_REMOTE_CACHE_SIGNATURE_KEY. Turborepo will reject any downloaded artifacts that have an invalid signature or are missing a signature.

preflight

Default: false

When enabled, any HTTP request will be preceded by an OPTIONS request to determine if the request is supported by the endpoint.

timeout

Default: 30

Sets a timeout for remote cache operations. Value is given in seconds and only whole values are accepted. If 0 is passed, then there is no timeout for any cache operations.

apiUrl

Default: "https://vercel.com"

Set endpoint for API calls to the remote cache.

loginUrl

Default: "https://vercel.com"

Set endpoint for requesting tokens during turbo login.